Merge branches 'for-rc' and 'ti-soc' of .git into next

Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt

@@ -57,4 +57,17 @@ bandgap {
 		0x4a002380 0x2c
 		0x4a0023C0 0x3c>;
 	compatible = "ti,omap5430-bandgap";
+	interrupts = <0 126 4>; /* talert */
+};
+
+DRA752:
+bandgap {
+	reg = <0x4a0021e0 0xc
+		0x4a00232c 0xc
+		0x4a002380 0x2c
+		0x4a0023C0 0x3c
+		0x4a002564 0x8
+		0x4a002574 0x50>;
+	compatible = "ti,dra752-bandgap";
+	interrupts = <0 126 4>; /* talert */
 };

drivers/thermal/cpu_cooling.c

@@ -167,7 +167,7 @@ static int get_property(unsigned int cpu, unsigned long input,
 			continue;
 
 		/* get the frequency order */
-		if (freq != CPUFREQ_ENTRY_INVALID && descend != -1)
+		if (freq != CPUFREQ_ENTRY_INVALID && descend == -1)
 			descend = !!(freq > table[i].frequency);
 
 		freq = table[i].frequency;

drivers/thermal/thermal_core.c

@@ -156,7 +156,8 @@ int get_tz_trend(struct thermal_zone_device *tz, int trip)
 {
 	enum thermal_trend trend;
 
-	if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
+	if (tz->emul_temperature || !tz->ops->get_trend ||
+	    tz->ops->get_trend(tz, trip, &trend)) {
 		if (tz->temperature > tz->last_temperature)
 			trend = THERMAL_TREND_RAISING;
 		else if (tz->temperature < tz->last_temperature)

drivers/thermal/ti-soc-thermal/Kconfig

@@ -46,3 +46,15 @@ config OMAP5_THERMAL
 
 	  This includes alert interrupts generation and also the TSHUT
 	  support.
+
+config DRA752_THERMAL
+	bool "Texas Instruments DRA752 thermal support"
+	depends on TI_SOC_THERMAL
+	depends on SOC_DRA7XX
+	help
+	  If you say yes here you get thermal support for the Texas Instruments
+	  DRA752 SoC family. The current chip supported are:
+	   - DRA752
+
+	  This includes alert interrupts generation and also the TSHUT
+	  support.

drivers/thermal/ti-soc-thermal/Makefile

 obj-$(CONFIG_TI_SOC_THERMAL)		+= ti-soc-thermal.o
 ti-soc-thermal-y			:= ti-bandgap.o
 ti-soc-thermal-$(CONFIG_TI_THERMAL)	+= ti-thermal-common.o
+ti-soc-thermal-$(CONFIG_DRA752_THERMAL)	+= dra752-thermal-data.o
 ti-soc-thermal-$(CONFIG_OMAP4_THERMAL)	+= omap4-thermal-data.o
 ti-soc-thermal-$(CONFIG_OMAP5_THERMAL)	+= omap5-thermal-data.o

drivers/thermal/ti-soc-thermal/ti-bandgap.c

@@ -469,7 +469,7 @@ static inline int ti_bandgap_validate(struct ti_bandgap *bgp, int id)
 {
 	int ret = 0;
 
-	if (IS_ERR_OR_NULL(bgp)) {
+	if (!bgp || IS_ERR(bgp)) {
 		pr_err("%s: invalid bandgap pointer\n", __func__);
 		ret = -EINVAL;
 		goto exit;
@@ -992,9 +992,12 @@ int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend)
 		goto exit;
 	}
 
+	spin_lock(&bgp->lock);
+
 	tsr = bgp->conf->sensors[id].registers;
 
 	/* Freeze and read the last 2 valid readings */
+	RMW_BITS(bgp, id, bgap_mask_ctrl, mask_freeze_mask, 1);
 	reg1 = tsr->ctrl_dtemp_1;
 	reg2 = tsr->ctrl_dtemp_2;
 
@@ -1008,22 +1011,25 @@ int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend)
 	/* Convert from adc values to mCelsius temperature */
 	ret = ti_bandgap_adc_to_mcelsius(bgp, temp1, &t1);
 	if (ret)
-		goto exit;
+		goto unfreeze;
 
 	ret = ti_bandgap_adc_to_mcelsius(bgp, temp2, &t2);
 	if (ret)
-		goto exit;
+		goto unfreeze;
 
 	/* Fetch the update interval */
 	ret = ti_bandgap_read_update_interval(bgp, id, &interval);
 	if (ret || !interval)
-		goto exit;
+		goto unfreeze;
 
 	*trend = (t1 - t2) / interval;
 
 	dev_dbg(bgp->dev, "The temperatures are t1 = %d and t2 = %d and trend =%d\n",
 		t1, t2, *trend);
 
+unfreeze:
+	RMW_BITS(bgp, id, bgap_mask_ctrl, mask_freeze_mask, 0);
+	spin_unlock(&bgp->lock);
 exit:
 	return ret;
 }
@@ -1191,7 +1197,7 @@ int ti_bandgap_probe(struct platform_device *pdev)
 	int clk_rate, ret = 0, i;
 
 	bgp = ti_bandgap_build(pdev);
-	if (IS_ERR_OR_NULL(bgp)) {
+	if (IS_ERR(bgp)) {
 		dev_err(&pdev->dev, "failed to fetch platform data\n");
 		return PTR_ERR(bgp);
 	}
@@ -1207,17 +1213,19 @@ int ti_bandgap_probe(struct platform_device *pdev)
 	}
 
 	bgp->fclock = clk_get(NULL, bgp->conf->fclock_name);
-	ret = IS_ERR_OR_NULL(bgp->fclock);
+	ret = IS_ERR(bgp->fclock);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to request fclock reference\n");
+		ret = PTR_ERR(bgp->fclock);
 		goto free_irqs;
 	}
 
 	bgp->div_clk = clk_get(NULL,  bgp->conf->div_ck_name);
-	ret = IS_ERR_OR_NULL(bgp->div_clk);
+	ret = IS_ERR(bgp->div_clk);
 	if (ret) {
 		dev_err(&pdev->dev,
 			"failed to request div_ts_ck clock ref\n");
+		ret = PTR_ERR(bgp->div_clk);
 		goto free_irqs;
 	}
 
@@ -1522,6 +1530,12 @@ static const struct of_device_id of_ti_bandgap_match[] = {
 		.compatible = "ti,omap5430-bandgap",
 		.data = (void *)&omap5430_data,
 	},
+#endif
+#ifdef CONFIG_DRA752_THERMAL
+	{
+		.compatible = "ti,dra752-bandgap",
+		.data = (void *)&dra752_data,
+	},
 #endif
 	/* Sentinel */
 	{ },

drivers/thermal/ti-soc-thermal/ti-bandgap.h

@@ -400,4 +400,9 @@ extern const struct ti_bandgap_data omap5430_data;
 #define omap5430_data					NULL
 #endif
 
+#ifdef CONFIG_DRA752_THERMAL
+extern const struct ti_bandgap_data dra752_data;
+#else
+#define dra752_data					NULL
+#endif
 #endif

drivers/thermal/ti-soc-thermal/ti-thermal-common.c

@@ -38,6 +38,7 @@
 /* common data structures */
 struct ti_thermal_data {
 	struct thermal_zone_device *ti_thermal;
+	struct thermal_zone_device *pcb_tz;
 	struct thermal_cooling_device *cool_dev;
 	struct ti_bandgap *bgp;
 	enum thermal_device_mode mode;
@@ -77,10 +78,12 @@ static inline int ti_thermal_hotspot_temperature(int t, int s, int c)
 static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
 				      unsigned long *temp)
 {
+	struct thermal_zone_device *pcb_tz = NULL;
 	struct ti_thermal_data *data = thermal->devdata;
 	struct ti_bandgap *bgp;
 	const struct ti_temp_sensor *s;
-	int ret, tmp, pcb_temp, slope, constant;
+	int ret, tmp, slope, constant;
+	unsigned long pcb_temp;
 
 	if (!data)
 		return 0;
@@ -92,16 +95,22 @@ static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
 	if (ret)
 		return ret;
 
-	pcb_temp = 0;
-	/* TODO: Introduce pcb temperature lookup */
+	/* Default constants */
+	slope = s->slope;
+	constant = s->constant;
+
+	pcb_tz = data->pcb_tz;
 	/* In case pcb zone is available, use the extrapolation rule with it */
-	if (pcb_temp) {
-		tmp -= pcb_temp;
-		slope = s->slope_pcb;
-		constant = s->constant_pcb;
-	} else {
-		slope = s->slope;
-		constant = s->constant;
+	if (!IS_ERR(pcb_tz)) {
+		ret = thermal_zone_get_temp(pcb_tz, &pcb_temp);
+		if (!ret) {
+			tmp -= pcb_temp; /* got a valid PCB temp */
+			slope = s->slope_pcb;
+			constant = s->constant_pcb;
+		} else {
+			dev_err(bgp->dev,
+				"Failed to read PCB state. Using defaults\n");
+		}
 	}
 	*temp = ti_thermal_hotspot_temperature(tmp, slope, constant);
 
@@ -115,7 +124,7 @@ static int ti_thermal_bind(struct thermal_zone_device *thermal,
 	struct ti_thermal_data *data = thermal->devdata;
 	int id;
 
-	if (IS_ERR_OR_NULL(data))
+	if (!data || IS_ERR(data))
 		return -ENODEV;
 
 	/* check if this is the cooling device we registered */
@@ -137,7 +146,7 @@ static int ti_thermal_unbind(struct thermal_zone_device *thermal,
 {
 	struct ti_thermal_data *data = thermal->devdata;
 
-	if (IS_ERR_OR_NULL(data))
+	if (!data || IS_ERR(data))
 		return -ENODEV;
 
 	/* check if this is the cooling device we registered */
@@ -273,6 +282,8 @@ static struct ti_thermal_data
 	data->sensor_id = id;
 	data->bgp = bgp;
 	data->mode = THERMAL_DEVICE_ENABLED;
+	/* pcb_tz will be either valid or PTR_ERR() */
+	data->pcb_tz = thermal_zone_get_zone_by_name("pcb");
 	INIT_WORK(&data->thermal_wq, ti_thermal_work);
 
 	return data;
@@ -285,7 +296,7 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
 
 	data = ti_bandgap_get_sensor_data(bgp, id);
 
-	if (IS_ERR_OR_NULL(data))
+	if (!data || IS_ERR(data))
 		data = ti_thermal_build_data(bgp, id);
 
 	if (!data)
@@ -296,7 +307,7 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
 				OMAP_TRIP_NUMBER, 0, data, &ti_thermal_ops,
 				NULL, FAST_TEMP_MONITORING_RATE,
 				FAST_TEMP_MONITORING_RATE);
-	if (IS_ERR_OR_NULL(data->ti_thermal)) {
+	if (IS_ERR(data->ti_thermal)) {
 		dev_err(bgp->dev, "thermal zone device is NULL\n");
 		return PTR_ERR(data->ti_thermal);
 	}
@@ -333,7 +344,7 @@ int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
 	struct ti_thermal_data *data;
 
 	data = ti_bandgap_get_sensor_data(bgp, id);
-	if (IS_ERR_OR_NULL(data))
+	if (!data || IS_ERR(data))
 		data = ti_thermal_build_data(bgp, id);
 
 	if (!data)
@@ -346,7 +357,7 @@ int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
 
 	/* Register cooling device */
 	data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
-	if (IS_ERR_OR_NULL(data->cool_dev)) {
+	if (IS_ERR(data->cool_dev)) {
 		dev_err(bgp->dev,
 			"Failed to register cpufreq cooling device\n");
 		return PTR_ERR(data->cool_dev);

drivers/thermal/ti-soc-thermal/ti-thermal.h

@@ -38,6 +38,9 @@
 #define OMAP_GRADIENT_SLOPE_5430_GPU				117
 #define OMAP_GRADIENT_CONST_5430_GPU				-2992
 
+#define DRA752_GRADIENT_SLOPE					0
+#define DRA752_GRADIENT_CONST					2000
+
 /* PCB sensor calculation constants */
 #define OMAP_GRADIENT_SLOPE_W_PCB_4430				0
 #define OMAP_GRADIENT_CONST_W_PCB_4430				20000
@@ -51,6 +54,9 @@
 #define OMAP_GRADIENT_SLOPE_W_PCB_5430_GPU			464
 #define OMAP_GRADIENT_CONST_W_PCB_5430_GPU			-5102
 
+#define DRA752_GRADIENT_SLOPE_W_PCB				0
+#define DRA752_GRADIENT_CONST_W_PCB				2000
+
 /* trip points of interest in milicelsius (at hotspot level) */
 #define OMAP_TRIP_COLD						100000
 #define OMAP_TRIP_HOT						110000